RFM73P Datasheet, PDF (6/25 Pages) List of Unclassifed Manufacturers – Low Power High Performance 2.4 GHz GFSK Transceiver Module

RFM73P-S2 V2.0
4 State Control
4.1 State Control Diagram
• Pin signal: VDD, CE
• SPI register: PWR_UP, PRIM_RX,
EN_AA, NO_ACK, ARC, ARD
• System information: Time out, ACK
received, ARD elapsed, ARC_CNT, TX
FIFO empty, ACK packet transmitted,
Packet received
RFM73P-S2 has built-in state machines
that control the state transition between
different modes.
When auto acknowledge feature is disabled,
state transition will be fully controlled by
MCU.
VDD>=3.3 V
Power Down
PWR_UP=1
PWR_UP=0
Time out or ACK received
Standby-I
CE=0
CE=1
ARD elapsed and ARC_CNT<ARC
CE=0
TX FIFO empty
RX
TX
Standby-II
TX FIFO
Data Ready
EN_AA=1
NO_ACK=0
Figure 3 PTX (PRIM_RX=0) state control diagram
6
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